Cookies are crisp if they are very low in moisture. The following factors contribute to crispness:
- Low proportion of liquid in the mix. Most crisp cookies are made from a stiff dough.
- High sugar and fat content.
- Evaporation of moisture during baking due to high temperatures and/or long baking.
- Small size or thin shape, so the cookies dry quickly during baking.
- Proper storage. Crisp cookies can become soft if they absorb moisture.
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